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Gigerwaldsee is a 
reservoir
A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation.
Reservoirs are created by controlling a watercourse that drains an existing body of wa ...
in the Calfeisental valley, located in the municipality of Pfäfers
Pfäfers is a municipality in the ''Wahlkreis'' (constituency) of Sarganserland in the canton of St. Gallen in Switzerland. The villages Pfäfers, St. Margrethenberg, Vadura, Valens, Vasön and Vättis belong to the municipality.
History
The ...
, Canton of St. Gallen, Switzerland. The reservoir has a volume of 35.6 million m³ and covers a surface area of .
The reservoir was formed by the arch dam
An arch dam is a concrete dam that is curved upstream in plan. The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, causing the arch to straighten slightly and strengtheni ...
Gigerwald, which was completed in 1976, standing at a height of 147 m.
See also
*List of lakes of Switzerland
This article contains a sortable table listing all major lakes of Switzerland. The table includes all still water bodies located either entirely or partly in Switzerland, both natural and artificial, that have a surface area of at least , regar ...
*List of mountain lakes of Switzerland
This is a list of high-altitude lakes of Switzerland. It includes all significant lakes located either entirely or partly in Switzerland, both natural and artificial, with an area of at least 4 ha (9.9 acres) and a location at over above sea l ...
External links
* Lakes of the canton of St. Gallen Reservoirs in Switzerland Arch dams {{StGallen-lake-stub